Hop-extracting apparatus.



J. TBND. KOOLMAN L W. PONNDORF.

HOP BXTRAGTING APPARATUS.

APPLICATION FILED SEPT. 6, 1912,

Patented Mar. 11, 1913.

2 SHEETS-SHEET l.

M26/855er.-

J. TEN D. KOOLMAN L W. PONNDORF.

HOP EXTRAGTING APPARATUS.

APPLICATION FILED s311126, 1912.

Patented Mar. 1 1, 1918 Z SHEETS-SHEET 2.

UNITED .sTATns PATENT union;

JACOBUS TEN DOORNKAAT KOOLMAN AND WILHELM PONNDORF, 0F CASSiE-L, GERMANY.

HOP-EXTRACTING APPRATUS.

Specification of Letters Patent.

AlPatented Mar. 11, 1943.

AppIication led September 6, 1912. Serial No. 718,981.

To all whom t may concern Be it known that we, JAcoBUs TEN DooizN- KAAT KooLMAN and VILHELM PoNNDonr. citizens of the Empire of Germany, residing at Cassel, in the Empire of Germany, have invented a new and useful Hop-EXtracting Apparatus, of which the following is a specitication.

Our invention relates to an apparatus forQ enlarged scale the lower end of the central' tubecand an adjustable sleeve for regulating the downward passage of the hop strobiles, Fig. 4 shows a modication ofthis regulating'device, Fig. 5 is a horizontal section through the apparatus on the line A-Bin F ig. 1, and Fig. 6 illustrates thel upper surface of the theoretical solid of revolution deA scribed by the liquid in the apparatus.

Similar characters of reference refer to similar parts throughout the several views. 4 is a round vessel which for the greater lower` part is conical and tapers upward and for the upper vpart is cylindrical and has a larger diameter forming a shoulder 13. rlhe vessel 4 is lclosed with a suitable cover 29,

which is provided with a hole 35, that can be closed with a turnable cover 3G. On the shoulder 13 is fastened an annular conical, upwardly tapering sieve 5, which beneath the hole 35 is provided with a hole 37. r1`his hole 37 is normally closed with a sieve piece 38, which can be taken oi by means of a handle 39.- Two opposite brackets 14, 14 are provided on the inside of the upper vessel apparat-us, after` the cover 36 has been opened. The disk 16 has several (here four) pendent arms 18, 1 8, from which a funnel 7 is suspended. At the lower end the funnel 7 is connected with a tube 19, which slightly tapers downward and carries at the lower end a vertically adjustable sleeve 8, that diverges downward. The lower part of the funnel Tand the tube 19 are Vprovided wit-h slits or perforations 10, so that they serve as sieves.

A shaft 2O is mounted to turn in the upper bearing 17 and in a stuffing-box 21 pro-- vided in the center of the bottom vof the vessel 4. The shaft 20 has fastened on it a helical blade 9, an agitator l and a large bevel wheel 22 below the vessel 4. The heli-- cal blade 9 slightly tapers downward" and occupies only the central part of the funnel 7 and is in close proximity of the upper part of the tube 19, but gradually decreases in diameter downward, so that a clearance 23 is left between the outer edge of the blade 9 and the inside of the vtube 19, which clearance gradually increases 'downward The agitatorA 1 is shown as carrying one vertical arm 2 which is provided at the upper end with a scoop 32. The scoop 32 may turn its concave face to a point on theoutside of the funnel 7, so that itis substantially inclined to the vertical plane of the agitator 1. On twoopposite arms 18, 18 two ladles 3, 3 'of the shape shown in Fig. 5 are preferably fastened. The large bevelwheel 22 is yto be driven from without in any known manner, for example by means'of a small bevel wheel 24 anda shaft 25 carrying fast and loose pulleys 26, 27 and turning in a suitable bearing 28.

rlhe vessel 4 is at its bottom connected with a. tube 12 for admitting cold water and also with another tube 41 for leading off the water. The vessel 4 is also provided with a tube 42 for leading 0E the extract. A tube 43 is attached to the upper cylindrical part of the vessel 4- andeXtends through aahole inthe sieve 5 to some point between the lower part of the vessei 4 and the periphery of t-he top of the funnel 7;

The extracting apparat-us operates as follows: The cover 36 is opened and the sieve piece 38 is taken oft. Then hops are introduced into the lower'part of the vessel 4, after which the sieve piece 38V is replaced and the cover 36 is closed. Thereupon boiling water is introduced into the lower part jio 2 the liquid to rotate.

of the vessel 4 through the tube 43 and allowed to act for some time upon the hops so as to soften them by soaking, whereby they become supple. Afterward the belt is shifted from the loose pulley 26 to the fast one 27 for starting the apparatus. The agitator 1 will carry along with it the hops,

and set in conjunction with the vertical arm As is well known, inthe cylindrical d rum of a centrifugal machine-'the upper surface of the liquid forms a paraboloid. The agitator 1 and its arm 2 with the scoop 32however, throw the liquid upward along the conical walls of ,the vessel 4 and the conical sieve 5,.that is along the surface of a paraboloid 30 in Fig. 6., so that the liquid flows inward l and ,heavily falls into the.funnel 7 along the surface of the solid 31 of Irevolution in Fig. 6. It is essential, that the agitator 1 sweeps the whole bottom of the vessel and that the .scoops 32 and 3, 3 positively guide the hops into the funnel 7. Without the scoops 32 and 3, 3 the hops would remain in proximity of: the outside of the funnel 7 and would not pass into the funnel. The hops are most bulky and would, not' at once partake inl the motion of the liquid, if the long agitator 1 were not provided, so that it would take a long time before the hopswere put` into proper. circulation with the liquid.1

l Without the ladles 3, 3`also the hops would require about an,hour,'before they are put into circulation. Where so preferred, the agitator 1 may-carry more than one vertical arm 2 so as to facilitate its work. Of course vthe motion 'of the liquid with the hops 'words the hop strobiles will gradually form lumps. As the liquid passes downward at a greater speed than would correspond to the lon itudinal relative speed of the helical blade 9, thev lumps-of hop strobiles will be again divided and forced outward through the annular passage 6 between the .lower edge of the sleeve 8 and the nave of the agitator 1.

Where. so preferred, the adjustable sleeve. 8 may be replaced by an upwardly tapering valve 33 (Fig. 4) longitudinally movable on the shaft 20 and pressed upward by afhelical spring 11 against a downwardly diverg-F ing projection 34e of the tube19. Thereby I' the motion of the hop strobiles in the tube 19 water.

will be retarded, soas to enable the helical blade 9 to compress the hop strobiles and to force them out. In this'manner the hops are first pushed downward and then so to rolled undervpressure. It is to be noted, that as the tube 19 slightly tapers down, the liquid will be better squeezed out of the hop strobiles through the perforations 10'. The hop strobiles are at the same time floosened and separated from their ribs and stems, without however destroying the ribs and stems and extracting from them the substances objectionable to the taste of the beer. Of course during the work of the apparatus the liquid is repeatedly circulated with the hop strobiles through the apparatus, whereby the hop strobiles aresubjected to the action of the extracting liquid. It isunnecessary .I

toW specially heatf the extract, vwhich maintains a temperature-of about 75 centigrade. This temperature is most favorable for the result-ing beer. After the treatment of the hops is finished, the apparatus is stopped and cold water is admittedl to the vessel 4 through the tube 12,' which cold water rinses the rest-of the extractive matter out of the hop strobiles and raises the extract upward toward the level, from where the extract is discharged through I. the tube 42. Preferably `the temperature vof theV cold water should be 4Q centigrade; however, it may also be alittlehigher.A The-removal of the extract from the hop strobiles by means of the cold water is very essential, since evenl after the most severe treatment the hops still contain much extract, which can now be easily removed The extracting withoutQ departing from the spirit .of ourl invention.

.blade on said shaft above said agitator, a

funnel suspended from said vessel and surrounding the upper part of said helicall blade, 'a vperforated tube attached to 4the lower end of said funnel and surrounding the lower part of said helical blade while leaving an annular passage above said agitator, means for positivelyyguiding the agitated liquid'with the hop strobiles upward along the walls of 'said vessel and inward into said funnel, and means for driving said shaft. j

2. In a hop extracting apparatus, the conlbination with a round vessel, of a vertical central shaft mounted to turn in said vessel,

b ymeans of the cold apparatus can be varied an agitator on said shaft adapted to sweep the whole bottom of said vessel, a helical blade on said shaftabove said agitator.

slightly tapering downward, a funnel sus'- isc pended from said vessel and surrounding the upper part of said helical blade, a perforated tube attached to thehlower end of said funnel and surrounding the lower part of said helical blade while leaving an annular passage above said agitator, means for admitting hops to said vessel, means for introducing means for driving `said shaft.

sol

' 3. ina hop extracting apparatus, the com bination with a round -vessel tapering upward, of a concave cover covering said vessel, a concave sieve Abeneath saidaconcave cover, a vertical central shaft mounted to sieve, a funnel suspended from said pendent arms and surrounding the upper part of said helical blade, a perforated tubeattached to the lower nd'of said funnel and, surrounding the lower part ofsaid helical blade while Y leaving an annular passage above said agi.-

tator, ladles'o'n said vpendent'arms above said funnel, means for admitting hops through saidfcover and said sieve to said vessel, means for introducinghot water into said vessel,

said agitator being adapted Ato positively guide the liquid with the hop strobiles upward along the walls of said vessel and said sieve and said ladles being adapted to positively guide the liquid ,with the hop strobiles inward into said funnel, means for 'admitting @ld water to said vessel at the bottom, means for discharging the extractfrom said vessel, means for leading oli vthe waterfrom the bottom of said vessel,.and means Vfor driving said shaft. 4. In a hop extracting apparatus, the combination with a round vessel comprising a lower conical part tapering upward and an upper part of larger diameter, of a cover for covering the upper part of said vessel and chaving a hole, a shutter for the hole of said cover, a conical annular sieve covering the lower part of said vessel and tapering up fvard and having a detachable piece, a concentric annular disk for, covering the outer part of the opening in said conical annular sieve, a bearing bridging over the opening of said annular disk, a stufing box inthe center of the bottom of said vessel, a vertical shaft mounted-to turn in said bearing and said stuling box, an agitator on said shaft within said vessel adapted to sweep the whole bota tom and comprising arms reaching upward,

above ,said agitator slightly tapering downward, pendent arms on said annular disk, a funnel'suspendedfrom said pendent arms and surrounding the upper part of said helical blade, a perforated tube attached to the lower end of sa'id funnel andsurrounding the lower part of said helical blade while vleaving an annular passage above said agitator, scoops on said .pendent arms above vsaid funnel, said shutter and said detachable `sieve piece being adapted to admit hops to troducing hot water through said annular i sieve into the lower part of saidivessel, said 'agitator being adapted'to positively guide the liquid' with the hop strobiles upward alongthe walls'of said vessel and said annular conical sieve and said scoops beingadapted to positively guide the liquid with the hop strobiles inward into said funnel, means for admitting cold water to said vessel at Vthe bottom, means for discharging the extract from said vessel, means for leading of):l the 'water from the-bottom of said vessel, and 4 means for driving said shaft.A In'testimony whereof we aflix.V our signan turesin presence of two .witnesses JleoBUs TEN'noORNKAAT KOOLMAN. WILELM ieoiiiinomi. y n

Witnesses:

SOPHIE' ENGELAND,

A' FRITZ HisMignition.'`

80,. the lower part of said vessel, means for in-l v. 

